Improvement in power mechanisms for hammers



B MURPHY 2Sheets-Sheet1, Power Mechanism for Hammers No. 200,748.Patented Feb. 26,1878.

rv M w ll; I 6 ii 1 Wu Z 9 Z :I H 740.1 g G l II|| /e Z I IlialnlIlqEssEs K jmle /hw N. PETERS. FHOTO-LITNHGRAPHER, WASHINGTON D Gwllqesses.

2 Sheets-Sheet 2,

B. MURPHY. I Power Mechanism for Hammers No. 200,748. Patented Feb.26,1878.

UNITED STATES PATENT OFFICE.

" BENJAMIN lvr'unrn'r, oF'ALIJEGnEnr, PENNSYLVANIA.

IMPROVEMENT ,INPOWER MECHAN'ISMSFOR HAMM'ERS.

Specification forming part of Letters Patent N0. 200,74 S,dated February26, 1878 "application filed I December 28,1877; I v

To all whom it may amm Hammers and I do hereby declare the following tobe a full, clear, and exact description thereof, reference being had tothe accompanying drawing, forming part of this specification, in whichvp 7 Figure 1 is a plan view of devices embodying my invention. Fig. 2 isan elevation of a portion of the devices, and Fig. 3 is an elevation ofthe power mechanism, partly in section.

Like letters refer to like parts wherever they occur.

My invention relates to mechanism for actuating an Oliver or otherhammer, and for regulating and controlling the blow thereof; andconsists, first, in interposing a shaft,'with crankpin andindependently-pivoted slide, between the power-shaft and hammer, wherebya slow rising and quick falling motion is imparted to the hammer, as inhand-striking; secondly, in actuating the hammer from the power-shaft bya slotted arm and link adjustable thereon, whereby the distance throughwhich the hammer is caused to move may be controlled thirdly, inconnecting the hammer and slotted arm of the power'shaft by anadjustable link, whereby the relations of the hammer to the anvil can beregulated at will.

I will now proceed to describe my invention, so that others skilled inthe art to which it appertains may apply the same.

Upon a suitable bed, A, is placed an anvilblock, B, and hammer O, thelatter pivoted by its helve c in bearings 1), preferably supported onanarm, b, extending from the block B, the bearings being hinged andconnected by a cross-bolt, b adapted, as shown, to be adjusted tocompensate for any wear in the hammer bearings. From a post, D, in rearof the hammer, or from other suitable point, extends a spring-arm, d,connected to the hammer-helve by a link, chain, rod, or like means, cl,which devices assist the lift of the hammer after its downward stroke.This spring, if made stiff, as it should be, supports the weight of thehammer in such wise that the hammer will be two shafts-the one, F,adapted to oscillate being provided on its end with a box, (or guides,*)

f, in which moves a slide, 9 that engages with a crank-pin secured tothe other (or power) shaft, E. I r

E represents a power-shaft fitted with the loose pulley e and a slidingclutch, e, the latter connected to shaft E by a spline, or in othersuitable manner, so as to rotate therewith, and operated by theshippinglever e and treadle e On the extremity of shaft E is acrank-pin, h, which engages with the slide 9, so that the revolution ofthe power-shaft is I converted into a reciprocating motion in the slide,and an oscillatory motion in shaft F.

Secured to shaft F, or box 7", thereof is a slotted arm, I, carrying apin or bolt, 4 adjustable along the slot, said bolt?) serving to pivot alink, L, which connects the arm I and hammershaft. Accordingly as thepivot-bolt 11 is adj usted along the slotted arm, so as to be nearer toor farther from the shaft F or center of motion, will the stroke of the.hammer be longer or shorter.

The link L is made in two sections, 1 l connected by aright-and-left-hand-threaded nut or coupling, 1 so that the link can belengthened or shortened at will, to adjust the hammer with relation tothe anvil.

The operation of these devices is as follows: A belt from a suitabledriving-shaft being passed around the loose pulley and the clutch epressed against pulley e, the power-shaft E is rotated, and through itscrank h reeiprocates the slide 9, imparting an oscillatory motion toslotted arm I, which, through link L, causes the hammer to rise with a.slow motion and fall with a quick stroke, as in hand-hammering.

The hammer will move through the greatest space or have the longeststroke when the link is at the extremity of theslotted arm, and in orderto decrease the length of the stroke all that is required is to loosenthe nut or pin 1: and move the pin or pivot in along the arm I, ornearer the center of motion. If, after lengthening or shortening thestroke by the means specified, or from other. cause, it is found thatthe hammer works too close to the anvil, or does not work as close tothe anvil as is desired, the link-coupling Z may be turned to lengthenor shorten link L, and thus regulate the relation of the hammer to theanvil.

While not wishing to limit myself in the construction of the clutch andloose pulley of the power-shaft, I would state that Iprefer to employ afriction-clutch rather than a positive clutch, as therebythe machineryis guarded against any injury which might be done by the rebound of thehammer, the jar, 850.; and to render the clutch more effective I usuallyface either the clutch or loose pulley with leather.

The shaft F may be dispensed with or reduced .to a mere pivot for box f,if desired.

The advantages of my invention are, that a slow rising and quick fallingmotion can be Having thus described my invention, what I claim, anddesire to secure by Letters Patent, is-- 1. The combination, with anOliver or like hammer, of the power-shaft, provided with a crank-pin,'aslide, and independently-pivoted ways, and connecting devices foroperating the hammer from the independently-pivoted ways, substantiallyas specified.

2. The combination, with the hammer, of the power-shaft, provided with acrank-pin, a slide, and its pivoted ways or box, an arm projecting fromthe box, and a link adjustable on the arm, substantially as and for thepurpose specified.

3. The combination, with a hammer of the class specified, of thepower-shaft, provided with a crank-pin, a slide, and its pivoted ways,the link-arm, and adjustable link, substantially as and for the purposespecified.

In testimony whereof I, the said BENJAMIN MURPHY, have hereunto set myhand.

BENJAMIN MURPHY.

Witnesses F. W. BITTER, Jr., W. BAKEWELL.

